Cnc3 Windows 7 How Well Will This Pc Play Games?

How well will this pc play games? - cnc3 windows 7

Dell Inspiron, 530
Specifications
Q6600 2.4GHz CPU
4 GB DDR2 800MHz RAM
256 GDDR4 ATI 2600XT
2 units x 320 GB HDD
Windows Vista SP1 (32 bit)
19 "1280 * 1024
Can I change the settings on new games?
(Cyris, Supreme Commander, CNC3, NFS Carbon etc?)
and what score I expect? (I know it means nothing!)